Experimental and Numerical Analysis of the Heat Flux Occurring in a Nitrous Oxide/Ethene Green Propellant Combustion Demonstrator

2015 ◽  
Author(s):  
Lukas K. Werling ◽  
Benjamin Hochheimer ◽  
Adrian L. Baral ◽  
Andreas Gernoth ◽  
Stefan Schlechtriem
Keyword(s):  
Heat Flux ◽  
Nitrous Oxide ◽  
Numerical Analysis ◽  
Propellant Combustion ◽  
Green Propellant

Numerical analysis of two dimensional pin fins with non-constant base heat flux

2005 ◽  
Vol 46 (6) ◽  
pp. 881-892 ◽  
Author(s):  
Yu-Ching Yang ◽  
Haw-Long Lee ◽  
Eing-Jer Wei ◽  
Jenn-Fa Lee ◽  
Tser-Son Wu
Keyword(s):  
Heat Flux ◽  
Numerical Analysis ◽  
Two Dimensional ◽  
Pin Fins

scholarly journals The effect of different aspect ratio and bottom heat flux towards contaminant removal using numerical analysis

2013 ◽  
Vol 50 ◽  
pp. 012015
Author(s):  
M N A Saadun ◽  
C S Nor Azwadi ◽  
Z A A Malek ◽  
M Z A Manaf ◽  
M S Zakaria ◽  
...  
Keyword(s):  
Heat Flux ◽  
Numerical Analysis ◽  
Aspect Ratio ◽  
Contaminant Removal ◽  
Bottom Heat

scholarly journals A Numerical Analysis on Nanofluid Mixed Convection in Triangular Cross-Sectioned Ducts Heated by a Uniform Heat Flux

2015 ◽  
Vol 7 (1) ◽  
pp. 292973 ◽  
Author(s):  
Oronzio Manca ◽  
Sergio Nardini ◽  
Daniele Ricci ◽  
Salvatore Tamburrino
Keyword(s):  
Heat Flux ◽  
Numerical Analysis ◽  
Mixed Convection ◽  
Uniform Heat Flux ◽  
Uniform Heat

Three-Dimensional Numerical Analysis for Convection of Air in a Bore Space of a Superconducting Magnet

2003 ◽  
Author(s):  
G. Tomita ◽  
M. Kaneda ◽  
T. Tagawa ◽  
H. Ozoe
Keyword(s):  
Magnetic Field ◽  
Heat Flux ◽  
Natural Convection ◽  
Numerical Analysis ◽  
Strong Magnetic Field ◽  
Three Dimensional ◽  
Superconducting Magnet ◽  
Constant Heat Flux ◽  
Constant Heat ◽  
Magnetizing Force

Three-dimensional numerical computations were carried out for the natural convection of air in a horizontal cylindrical enclosure in a magnetic field, which is modeled for a bore space of a horizontal superconducting magnet. The enclosure was cooled from the circumferential sidewall at the constant heat flux and vertical end walls were thermally insulated. A strong magnetic field was considered by a one-turn electric coil with the concentric and twice diameter of the cylinder. Without a magnetic field, natural convection occurs along the circumferential sidewall. When a magnetic field was applied, magnetizing force induced the additional convection, that is, the cooled air at the circumferential wall was attracted to the location of a coil. Consequently, the temperature around the coil decreased extensively.

Numerical Analysis to Predict the Temperature Distribution and Heat Transfer Rate From a Satellite Structure and Experimental Comparison

2012 ◽  
Author(s):  
Daniel T. Schwendtner ◽  
M. Ruhul Amin ◽  
David M. Klumpar
Keyword(s):  
Heat Flux ◽  
Numerical Analysis ◽  
Temperature Increase ◽  
Experimental Results ◽  
Vacuum System ◽  
Experimental Comparison ◽  
Bottom Plate ◽  
Flux Rate ◽  
Thermal Vacuum ◽  
Satellite Structure

Due to their small size and other attractive features, nanosatellites are becoming popular in space applications. Experimental investigation of the thermal behavior of such a satellite can be conducted in a laboratory setup using a thermal vacuum chamber to mimic the conditions of outer space. A small, cost effective thermal vacuum system was desired for performing thermal vacuum testing on nanosatellites. Numerical calculations and laboratory testing were performed as part of the design of this thermal vacuum system. A numerical method using the finite element method was employed to determine the amount of heat flux needed to be applied at the bottom plate of a satellite to achieve a certain rate of temperature increase in the plate. The numerical analysis was performed on a 40.5 kg satellite structure to predict the heat rate per unit area through its bottom surface when it was cycled in the temperature range of −40°C to +80°C with a rate of temperature change from 1°C/min to 5°C/min. A time dependent increase in temperature on the bottom wall was used as a boundary condition. The rest of the satellite walls were assumed to be insulated. Contact resistances between the components of the satellite structure were neglected. Temperature and heat flux distributions on various walls of the satellite were computed and reported in the study. From the numerical results, a maximum heat flux rate of 3,332 W/m2 was calculated on the bottom plate for a temperature increase rate of 1.5°C/min of the plate. A similar experimental setup was tested under similar conditions as a comparison and as a method to validate the thermal system design. Experimental results indicated a heat flux rate of 17,094 W/m2 through a test satellite. The difference between the numerical and experimental results is attributed to geometric differences between the numerical satellite model and the experimental test structure.

scholarly journals Phase Change Materials-Assisted Heat Flux Reduction: Experiment and Numerical Analysis

Energies ◽  
2016 ◽  
Vol 9 (1) ◽  
pp. 30 ◽  
Author(s):  
Hussein Akeiber ◽  
Seyed Hosseini ◽  
Mazlan Wahid ◽  
Hasanen Hussen ◽  
Abdulrahman Mohammad
Keyword(s):  
Heat Flux ◽  
Numerical Analysis ◽  
Phase Change ◽  
Phase Change Materials ◽  
Reduction Experiment
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